Context

When using Redis ElastiCache for critical operations like job handling, you may want to configure specific durability settings such as noeviction policy and append-only file persistence to ensure data reliability.

Answer

While Porter manages a default parameter group for your ElastiCache instance, you can set custom durability parameters by creating and attaching a secondary parameter group in AWS. Here's how to do it:

1. Access your AWS Console and navigate to the ElastiCache dashboard

2. Create a new parameter group with your desired settings:

   • maxmemory-policy: noevict

   • appendonly: yes

   • appendfsync: everysec

3. Attach this secondary parameter group to your ElastiCache instance alongside the Porter-managed parameter group